Design and development of Z-source multi-level inverter for solar energy

Global warming and the shortage of fossil fuels have led to the development of renewable energy resources in order to satisfy the feature energy demand of depleting plant. Multilevel inverters compared to single level inverters have advantages like minimum harmonic distortion, reduced EMI generation. Multi-level inverter is energy conversion device that is generally used to in medium voltage and high power application. This paper proposed a new solar power generation system, which is composed of a Z-source network and a new seven level inverter. In this new seven level inverter topology with the decreased number of power switches and its modulation technique is introduced. In this way, the proposed solar system generates a sinusoidal output voltage. The salient features of the proposed seven level inverter are that only six power switches and this structure allows a reduction of the system cost and size. Effectiveness of proposed topology has been illustrated by analysis and simulation.